0185-2620 0185-2620 S0185-26202006000200103 Mexico 00 12 2006 00 12 2006 32 103 125

2000 8 15 15 181-208 2005 12 24 24 2000 1976 1996 3 6 6 173 y s 2004 2005 2003 11 21 21 73-102 2003 11 21 21 1992 2000 37-82 1989 1990 81-135 2002 1991 1996 61-2 1982 1986